Pueraria flower extract rich in isoflavones and a method and application of the same

Abstract

A method of preparing a Pueraria flower extract rich in isoflavones includes: grinding dry Pueraria flowers to obtain a Pueraria flower powder; adding a first 20-50% ethanol solution to form a mixture, stirring and heating the mixture at 20-80° C. for 1-4 hours, removing the first solution, adding a second 20-50% ethanol solution, stirring and heating the mixture, removing the second solution, and combining the first solution and the second solution to obtain an extract solution; filtering the extract solution to remove solids; concentrating the extract solution under vacuum to obtain a crude extract containing 10-40% solid components; adding anhydrous ethanol solution to reach an ethanol concentration of the crude extract of 75-95%, storing the crude extract at 20-30° C. for 1-4 hours; centrifuging the crude extract at a speed of 2,000-5,000 r / min to obtain a supernatant; and concentrating and spray drying to obtain the Pueraria flower extract without any purification steps.

Description

[0001] This application claims priority to Chinese Patent Application No. 202010571300.0, filed on Jun. 22, 2020, which is incorporated by reference for all purposes as if fully set forth herein.TECHNICAL FIELD

[0002] The invention relates to medicine and food, and in particular, to a Pueraria flower extract rich in isoflavones and a method and application of the same.BACKGROUND TECHNIQUE

[0003] Pueraria flower is the dried flower of plant Puerarialobata (Willd.) Ohwi. It is included in the Medicine Standards of the Ministry of Health of the People's Republic of China, Chinese Medicinal Materials. It is non-toxic, has a sweet and cool medicinal nature, and is used to relieve hangover. It can be used for symptoms, such as excessive drinking, headache, dizziness, polydipsia, vomiting and heartburn. In addition, modern studies have found that Pueraria flower also has the effects of lowering blood sugar, lowering blood fat, antioxidant, anti-allergic, improving memory, lowering body fat and ...